let ddkSdk = require('./ddk_sdk')({
  client_id: 'b416c36c05934e7d851965a51780e10a',
  client_secret: '67a68a731a055a2c109b853b42c921554f350a79'
});

ddkSdk.pidGenerate().then(function (result) {
  console.log('result', JSON.stringify(result.data));
});